commit | b5aef8a44cd27e5101e349795d14f738b47ed259 | [log] [tgz] |
---|---|---|
author | Xin Li <delphij@google.com> | Fri Sep 11 03:34:01 2020 +0000 |
committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | Fri Sep 11 03:34:01 2020 +0000 |
tree | c6f284e1486e1907b84c607dbd0e3ef3e4f3244e | |
parent | 4d5d5ec4901ea5891014bff01242bcf385ca97ed [diff] | |
parent | 1768f1868c398ea4da1f22c43278b4b9b0f11542 [diff] |
[automerger skipped] Merge Android R am: 7650cd600d -s ours am: 497a8f0447 -s ours am: 1768f1868c -s ours am skip reason: Change-Id I50e7f5421205b77fa04666a84bf37ba7cdbb64ef with SHA-1 bfef11fb4f is in history Original change: https://android-review.googlesource.com/c/platform/packages/modules/SdkExtensions/+/1422463 Change-Id: I428b26500c53e89d6cafe8767a5a5661bda22954
SdkExtensions is a module that decides the extension SDK level of the device, and provides APIs for applications to query the extension SDK level.
The module is packaged in an apex, com.android.sdkext
, and has two components:
bin/derive_sdk
: Native binary that runs early in the device boot process and reads metadata of other modules, to set system properties relating to the extension SDK (for instance build.version.extensions.r
).javalib/framework-sdkextension.jar
: This is a jar on the bootclasspath that exposes APIs to applications to query the extension SDK level.derive_sdk
is a program that reads metadata stored in other apex modules, in the form of binary protobuf files in subpath etc/sdkinfo.binarypb
inside each apex. The structure of this protobuf can be seen here. The exact steps for converting a set of metadata files to actual extension versions is likely to change over time, and should not be depended upon.
The module exposes a java class SdkExtensions
in the package android.os.ext
. The method getExtensionVersion(int)
can be used to read the version of a particular sdk extension, e.g. getExtensionVersion(Build.VERSION_CODES.R)
.